All categories

3 years ago

The sum of two numbers is 138. One number is 20 less than the other. Find the numbers.

Mathematics

2 answers:

ad-work [718]3 years ago

7 0

Step-by-step explanation:

x + y = 138

x = y - 20

(y - 20) + y = 138

2y - 20 = 138

2y = 158

y = 79

Answer x = 79 - 20 = 59 = x

skad [1K]3 years ago

5 0

Answer:

Step-by-step explanation:This is two variables and two equations. x and y will be the two different numbers.

1.x + y =138

2.x= y-20

plug #2 into #1.

(y-20) + y = 138

2y - 20 = 138

2y = 158

y = 79 and plug into #2 and find x.

You might be interested in

What is 20.907x0.0004

salantis [7]

Answer:

0.0083628

Step-by-step explanation:

Here is the answer

5 0

3 years ago

Similar Triangles

Fudgin [204]

Answer:

B. 3/9 = 4/12 = 1/3

Step-by-step explanation:

I calculated it logically

3 0

3 years ago

Determine if the graph is a function then state the domain and range.

nignag [31]

<h3>Explanation</h3>

A function is a set of relation that doesn't have repetitive domain. If we want to know if a graph is function or not, we have to do the line test.

Line Test

Draw a vertical line. Make sure that a line passes through a graph.
See if a line intercepts a graph more than one point or just only one.

Result

If a line intercepts a graph more than one point, it is not a function.

However, if a line only intercepts a graph just one point, it is indeed a function.

The given graph from the question is a function because it passes line test.

Domain and Range

Domain is the set of all x-values, meaning we only focus on x-axis or x-value only.

Range is the set of all y-values. We only focus on y-value or y-axis for Range.

Determine Domain from Graph

We can simply say that the domain is from starting domain or x-coordinate point to end x-coordinate point. For example, if a graph starts at x = -4 and ends at x = 2, we can say that - 4<=x=2.

Determine Range from Graph

Similar to Domain except Range starts from the minimum value or point to the maximum point or value. For example if a graph starts at min point = 6 and max point = 9. We can say that 6<=y<=9.

From the graph, the domain starts from negative infinity to positive infinity. Meaning that x can be any numbers. Hence, the domain is set of all real numbers. For range, the minimum value is 0 and max value is positive infinity. Therefore we write y>=0.

<h3>Answer</h3>

 $\begin{cases} x \in \mathbb{R} \\ y \geqslant 0 \end{cases}$ 

Domain is set of all real numbers.

Range is greater or equal to 0.

8 0

3 years ago

Ben is 5 years less than 3 times Gracie's age. How can that be represented as an expression?

Tanzania [10]

You can write 5 times 3

7 0

3 years ago

There are 3 different urns of 12 balls with 4 white balls in each urn. three players—a, b, and c—successively draw from their re

Viktor [21]

1. Each player has a 1/3 chance of winning
2. Player A has a 1/3 chance of winning
Player B has a 4/11 chance of winning
Player C has a 2/5 chance of winning

4 0

3 years ago